These seemed great, colorful, light and easy to use. But every time we use them they were so light they moved out from under their feet when the boys tried to step on them. We have a two-year-old and a four-year-old grandsons and wanted to play hot lava, crocodiles in the water and gain some balance. They only caused frustration as they won’t stay where you place them, ended up getting kicked around the playroom and used as frisbees, not a great thing in the hands of these littles. So I’m returning them and getting weighted ones. Also these are crazy ridiculously overpriced for what they are! They’re basically made of the same material as those foam mats that snap together like puzzle pieces.